apply_filters( 'user_trailingslashit', string $url, string $type_of_url )

59	 *60	 * @param string $url         URL with or without a trailing slash.61	 * @param string $type_of_url The type of URL being considered. Accepts 'single', 'single_trackback',62	 *                            'single_feed', 'single_paged', 'commentpaged', 'paged', 'home', 'feed',63	 *                            'category', 'page', 'year', 'month', 'day', 'post_type_archive'.64	 */65	return apply_filters( 'user_trailingslashit', $url, $type_of_url );66}67 68/**69 * Displays the permalink anchor for the current post.70 *71 * The permalink mode title will use the post title for the 'a' element 'id'